Allium amplectens |
Allium neapolitanum |
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narrow-leaf onion, slim-leaf onion |
white garlic |
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Bulbs | 1–15+, increase bulbs absent or ± equaling parent bulbs, never appearing as basal cluster, not clustered on stout primary rhizome, ovoid to ± globose, 0.6–1.5 × 0.6–1.3 cm; outer coats enclosing 1 or more bulbs, brown, prominently cellular-reticulate, membranous, cells in ± vertical rows, forming irregular herringbone pattern, transversely elongate, V-shaped, without fibers; inner coats usually dark red, sometimes white to pink, cells obscure, quadrate. |
1–10+, not clustered on stout primary rhizome, rhizomes absent, bulbs absent or ± equaling parent bulbs, never appearing as basal cluster, subglobose, 1–2 × 1–2 cm; outer coats enclosing renewal bulbs, brown, cellular-reticulate, membranous, reticulum delicate, cells ± quadrate, without fibers; inner coats white, cells obscure, ± rectangular, vertically elongate. |
Leaves | persistent, withering from tip at anthesis, 2–4, basally sheathing, sheaths not extending much above soil surface; blade solid, subterete or ± channeled, 10–36 cm × 0.5–2 mm, margins entire. |
persistent, green at anthesis, 2–3, sheathing proximal 1/5–1/4 scape; blade solid, flat, not falcate, carinate, 15–50 cm × 5–20 mm, margins entire to denticulate. |
Scape | persistent, solitary, erect, solid, terete, 15–50 cm × 3–5 mm. |
persistent, solitary, erect, solid, ± triquetrous, 2-edged or slightly winged proximally, terete distally, 20–60 cm × 2–7 mm. |
Umbel | shattering after seeds mature, each flower deciduous with its pedicel as a unit, erect, compact, 10–50-flowered, hemispheric, bulbels unknown; spathe bracts persistent, 2–3, 6–13-veined, ovate, ± equal, apex short-acuminate. |
persistent, erect, loose, 10–25-flowered, ± hemispheric, bulbils unknown; spathe bract persistent, 1, 8–9-veined, ovate, ± equal, equaling pedicel, apex acute. |
Flowers | stellate, 5–9 mm; tepals spreading at anthesis, white to pink, lanceolate, ± equal, becoming papery and connivent over capsule, margins entire, apex acute; stamens included; anthers yellow or purple; pollen yellow; ovary crested; processes 6, lateral, ± prominent, ± rectangular, margins entire; style linear, equaling stamens; stigma capitate, scarcely thickened, unlobed; pedicel 4–16 mm. |
± erect, saucer-shaped, 7–12 mm; tepals spreading, white, broadly elliptic, ± equal, becoming membranous and connivent over capsule, margins entire, apex obtuse; stamens included; anthers yellow; pollen yellow; ovary crestless; style linear, ± equaling stamens; stigma capitate, scarcely thickened, unlobed; pedicel 15–35 mm. |
Seed | coat dull; cells minutely roughened. |
coat not known. |
2n | = 14, 21, 28. |
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Allium amplectens |
Allium neapolitanum |
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Phenology | Flowering Apr–Jul. | Flowering Mar–Apr. |
Habitat | Clay soils, including serpentine, dry slopes, and open plains | Disturbed sites |
Elevation | 0–1800 m (0–5900 ft) | 0–100 m (0–300 ft) |
Distribution |
CA; OR; WA; BC
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CA; s Europe [Introduced in North America]
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Discussion | All three chromosome races of Allium amplectens are widespread. The triploids are achiasmatic, causing a breakdown in the first meiotic division. This is followed by a normal second division resulting in pollen dyads that are, presumably, nonfunctional; seeds are produced by apomixis. The diploids and tetraploids produce normal pollen, in tetrads, that appears to be functional. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Allium neapolitanum is a garden escape, introduced from southern Europe. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 26, p. 262. | FNA vol. 26, p. 257. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | A. acuminatum var. gracile, A. attenuifolium, A. attenuifolium var. monospermum, A. monospermum, A. occidentale, A. serratum | |
Name authority | Torrey: Pacif. Railr. Rep. 4(5): 148. (1857) | Cirillo: Pl. Rar. Neapol. 1: 13. (1788) |
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